A symptom is something the patient senses and describes, while a sign is something other people, such as the doctor notice. For example, drowsiness may be a symptom while dilated pupils may be a sign. The symptoms overall of motion sickness include nausea, vomiting, and dizziness (vertigo). Other common signs are sweating and a general feeling of discomfort and not feeling well (malaise). Mild symptoms are categorized as headache, mild unease and yawning.
Carbon dioxide is transported in the blood from the tissue to the lungs in three ways: (i) dissolved in solution; (ii) buffered with water as carbonic acid; (iii) bound to proteins, particularly haemoglobin.Approximately 75% of carbon dioxide is transport in the red blood cell and 25% in the plasma.arbon dioxide transport in the tissue is summarized in Figure 1. It combines with water to form carbonic acid. This reaction is very slow in plasma but fast within the red blood cell owing to the presence of the enzyme carbonic anhydrase.
Bicarbonate Buffer: Carbon dioxide produced in the tissue cells diffuses into the blood plasma. The largest fraction of carbon dioxide diffuses into the red blood cells. The carbon dioxide in the red blood cells is transported as: dissolved CO 2, combined with hemoglobin, or as bicarbonate,(largest fraction).The formation of bicarbonate ions, (HCO 3 -) takes place by the following reactions:he largest fraction of carbon dioxide diffuses into the red blood cells. The carbon dioxide in the red blood cells is transported as: dissolved CO 2, combined with hemoglobin, or as bicarbonate,(largest fraction). The formation of bicarbonate ions, (HCO 3 -) takes place by the following reactions: